Improper input validation in MySQL Server - CVE-2025-21546

Vulnerability identifier: #VU103205

CSH Severity: Low

CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-21546

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote privileged user to read and manipulate data.

The vulnerability exists due to improper input validation within the Server: Security: Privileges component in MySQL Server. A remote privileged user can exploit this vulnerability to read and manipulate data.

MySQL Server
Anolis OS
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
openEuler
Ubuntu
mecab
mecab-ipadic-EUCJP
mecab-ipadic
mysql-server-8.0 (Ubuntu package)
mysql-devel
mysql-test
mysql-server
mysql-libs
mysql-help
mysql-errmsg
mysql-debugsource
mysql-debuginfo
mysql-config
mysql-common
mysql
mysql (Red Hat package)

Install updates from vendor's website.

MySQL Server - addressed in versions 8.0.41, 8.4.4, 9.2.0
mecab - update to 0.996-2
mecab-ipadic-EUCJP - update to 2.7.0.20070801-17.0.1
mecab-ipadic - update to 2.7.0.20070801-17.0.1
mysql-server-8.0 (Ubuntu package) - addressed in versions 8.0.41-0ubuntu0.20.04.1, 8.0.41-0ubuntu0.22.04.1, 8.0.41-0ubuntu0.24.04.1, 8.0.41-0ubuntu0.24.10.1
mysql-devel - update to 8.0.41-1
mysql-test - update to 8.0.41-1
mysql-server - update to 8.0.41-1
mysql-libs - update to 8.0.41-1
mysql-help - update to 8.0.41-1
mysql-errmsg - update to 8.0.41-1
mysql-debugsource - update to 8.0.41-1
mysql-debuginfo - update to 8.0.41-1
mysql-config - update to 8.0.41-1
mysql-common - update to 8.0.41-1
mysql - update to 8.0.41-1
mysql-test - update to 8.0.41-1.0.1
mysql-libs - update to 8.0.41-1.0.1
mysql-server - update to 8.0.41-1.0.1
mysql-errmsg - update to 8.0.41-1.0.1
mysql-devel - update to 8.0.41-1.0.1
mysql-common - update to 8.0.41-1.0.1
mysql - update to 8.0.41-1.0.1
mysql (Red Hat package) - update to 8.0.41-2.el9_5

• https://www.oracle.com/security-alerts/cpujan2025.html

• Multiple vulnerabilities in MySQL Server
• Ubuntu update for mysql-8.0
• openEuler update for mysql
• Red Hat Enterprise Linux 9 update for mysql
• Red Hat Enterprise Linux 8 update for the mysql:8.0 module
• Anolis OS update for mysql:8.0 module